Sealed Housing Structure With Conductive Inner Layer for EMI Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing housings for electrical components are expensive and have reduced electromagnetic shielding due to the use of conductive fillers and gaps between screws, leading to inefficiencies in connecting housing parts.
Innovation Solution
A housing design featuring a compressible element and an electrically conductive layer, where the conductive layer covers the inside of one housing part, allowing for non-conductive housing parts and eliminating the need for additional conductive fillers, with the compressible element providing sealing and the conductive layer ensuring electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive fillers are added to the seal or electrically conductive connecting elements are used to electrically connect housing parts, then electromagnetic shielding is improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent combines the sealing function and electromagnetic shielding function into a single seal element. The seal comprises a sealing portion for sealing and a connecting portion with electrical conductivity for electromagnetic shielding, eliminating the need for separate conductive fillers or connecting elements and reducing manufacturing cost while maintaining shielding effectiveness
Solution Approach 2:
The seal is designed to perform multiple functions simultaneously: it provides sealing to prevent liquid penetration, establishes electrical connection between housing parts, and ensures electromagnetic shielding. This multi-functional design eliminates the need for multiple separate components and reduces overall manufacturing complexity and cost
2Reliability
If screws are used to electrically connect housing parts at close distances, then electromagnetic shielding is improved, but the number of components and assembly complexity increases
Solution Approach 1:
The seal integrates the electrical connection function into its structure through the connecting portion that extends between housing parts. This eliminates the need for separate screws or connecting elements, reducing component count and assembly complexity while maintaining effective electrical connection for electromagnetic shielding
Solution Approach 2:
The single seal element performs sealing, electrical connection, and electromagnetic shielding functions simultaneously, replacing multiple separate components (seal + screws/connectors) with one integrated part, thereby reducing device complexity and assembly steps
3Reliability
If housing parts are made electrically conductive or coated with conductive layers, then electromagnetic shielding is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The electrical conductivity function is extracted from the housing parts themselves and transferred to the seal's connecting portion. This allows housing parts to be made from simpler, less expensive materials without conductive coatings, while the seal provides the necessary electrical connection for electromagnetic shielding
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for cost-effective production of housings with enhanced electromagnetic shielding by using a compressible seal and conductive layer, effectively preventing external contaminants and ensuring gap-free shielding.
Implementation Method 1
at least one compressible element which is arranged at least on the circumferential edge or in or on the circumferential contour, and which in the assembled state is arranged between the first housing part and the second housing part
Implementation Method 2
at least one first electrically conductive layer is provided, wherein in the assembled state of the housing, the electrically conductive layer covers the inside of the first housing part
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In a housing (1), preferably for accommodating electrical components, with - at least one first housing part (2) and at least one second housing part (4), which form a closed housing (1) in an assembled state, - wherein at least the first housing part (2) has a peripheral edge (8) or peripheral contour in the edge region, - at least one compressible element (6, 60) which is arranged at least on the peripheral edge (8) or in or on the peripheral contour, and which, in the assembled state, is arranged between the first housing part (2) and the second housing part (4), characterized in that at least one first electrically conductive layer (10) is provided, wherein, in the assembled state of the housing (1), the first electrically conductive layer (10) covers the inner side (13) of the first housing part (2).